Adinda Pijpers will defend the dissertation 'Preoperative management and postoperative outcomes in abdominal surgery of the neonate: A multidisciplinary approach of congenital duodenal obstruction, necrotizing enterocolitis and iodinated contrast induced hypothyroidism'. Supervisors are Prof. J.P.M. Derikx and Prof. L.W.E. van Heurn. The co-supervisor is Dr R.R. Gorter.